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31. 发明专利

JP2000046878A WATTHOUR METER USING HALL ELEMENT 失效
公开(公告)号：JP2000046878A
公开(公告)日：2000-02-18
申请号：JP21747198
申请日：1998-07-31
申请人： HITACHI CABLE , OSAKI ELECTRIC CO LTD
发明人： NIIZAWA MASAHARU , TAKAHASHI TAKESHI , IMAIZUMI MITSUHARU , KUDO MASAO
IPC分类号： G01R21/08
摘要： PROBLEM TO BE SOLVED: To carry out an accurate temperature compensation in a wide range of temperature regions simply inexpensively by constituting a Hall element and a resistor for the temperature compensation to the element of a GaAs crystal. SOLUTION: Two elements A, B of the same crossed shape are formed on a GaAs substrate crystal 7. One is used as a Hall element 1 for measurement and the other is used as a resistor 3 for temperature compensation. For example, a control current is applied to a lateral terminal of one crossed element A and an output voltage is extracted from a longitudinal terminal, and moreover a temperature compensation circuit is connected to a lateral or longitudinal terminal of the other crossed element B. In this case, since the Hall element 1 and resistor 3 are proximate and therefore thermally bond well, an accurate temperature compensation is enabled. At the same time, since the Hall element 1 and resistor 3 vary little in characteristic, a highly reliable temperature compensation is achieved. The Hall element 1 and the resistor 3 can be used separately.

32. 发明专利

JPH07244084A COULOMBMETER 失效
公开(公告)号：JPH07244084A
公开(公告)日：1995-09-19
申请号：JP3819894
申请日：1994-03-09
申请人： TOSHIBA CORP
发明人： MARUYAMA RYOJI , MOCHIZUKI HIROSHI , FUNAKI HIDEYUKI , FUJII KANAE
IPC分类号： G01R15/20 , G01R19/00 , G01R21/08 , H01L43/06
摘要： PURPOSE:To enable the quantity of electricity to be highly accurately measured at a low cost by realizing a compact peripheral circuit. CONSTITUTION:This apparatus has a current/magnetic field conversion means to convert a current value in a system to be measured into a magnetic field, a Hall element 1 in which a component of a Hall current generated with the application of the magnetic field converted is contained in the form of a different code in the respective output currents of a pair of current output terminals T3 and T4 and first and second current/voltage conversion means R1, OP1, R2 and OP2 to convert output currents from the pair of current output terminals T3 and T4 into voltages. Moreover, mean output means R3 and R4 are provided to determine a mean of the voltage converted and an operational amplifier OP3 is provided to supply a current to a pair of current input terminals T1 and T2 in the Hall element 1 so as to keep a mean voltage at a fixed value.

33. 发明专利

JPH06174765A POWER MULTIPLIER CIRCUIT 失效
公开(公告)号：JPH06174765A
公开(公告)日：1994-06-24
申请号：JP33084492
申请日：1992-12-11
申请人： TOSHIBA CORP
发明人： MARUYAMA RYOJI
IPC分类号： G01R21/08
摘要： PURPOSE:To provide a power multiplier circuit in which the fluctuation of offset voltage due to temperature variation or aging can be corrected automatically. CONSTITUTION:The power multiplier circuit comprises a first amplifier circuit 4 for amplifying the output voltage from a Hall element 3 in same phase, a second amplifier circuit 5 producing a voltage having the same magnitude as the output from the first amplifier circuit with phase being shifted by 180 deg., a circuit 6 for detecting the polarity of power supply voltage for a system to be measured, a circuit 7 for switching between the outputs from first and second amplifier circuits depending on the polarity of voltage, a circuit 9 for integrating the output, and a variable resistance element 10 for varying the resistance thereof depending on an output signal from the integrating circuit. This constitution realizes a highly accurate watt meter and watthour meter in which the fluctuation of offset voltage due to temperature variation or aging can be corrected automatically.

34. 发明专利

JPH05142272A WATTHOUR METER 失效
公开(公告)号：JPH05142272A
公开(公告)日：1993-06-08
申请号：JP30578791
申请日：1991-11-21
申请人： TOSHIBA CORP
发明人： KOBAYASHI SHUNICHI
IPC分类号： G01R21/08
摘要： PURPOSE:To suppress adverse effect of unbalanced voltage and improve characteristics by composing the output of a magnetoelectric conversion element connected to an auxiliary transformer and the output of another magnetoelectronic conversion element having same characteristics above-mentioned thereby offsetting the generated unbalanced voltage components. CONSTITUTION:In regard to a magnetoelectric conversion element 8 such as a Hall element, the output VH1 is ideally indicated by means of current (i) and a magnetic field B as follows: VH1=kiB (k: proportional constant). Within the magnetoelectric element 8 unbalanced voltage alpha practically generates to produce the unbalanced voltage VH1=kiB+alpha of alternating current + direct current. On the other hand the other unbalanced voltage VH2= beta alone generates without any application of a magnetic field caused by an auxiliary current convertor within another magnetoelectric conversion element 11 of a second electric power-voltage conversion part. When gains of amplification circuits 9, 12 are indicated as G1 and G2, an addition result caused by a composite circuit 13 is indicated as G1HH1+G2HH2=G1kiB+G1alpha+G2beta. The addition result VH of a composition circuit 13 becomes VH=G1kiB and the adverse effect of the unbalanced voltage alpha can be eliminated by regulating the gain G. of the amplification circuit 12 of the second electric power-voltage conversion part unto G2=-G1.alpha/beta.

35. 发明专利

JPS6117071A Measuring device for consumption energy of load 失效
标题翻译：负荷消耗能量测量装置
公开(公告)号：JPS6117071A
公开(公告)日：1986-01-25
申请号：JP10408885
申请日：1985-05-17
申请人： Pilkington Brothers Ltd
发明人： JIEFURII KUROSU , KENIISU JIEEMUZU BATORAA
IPC分类号： G01R21/08
CPC分类号： G01R21/08

36. 发明专利

JPS60228967A CLAMP SENSOR 失效
公开(公告)号：JPS60228967A
公开(公告)日：1985-11-14
申请号：JP8523084
申请日：1984-04-27
申请人： HIOKI ELECTRIC WORKS
发明人： SURIKI YASUFUMI , HASHIZUME KAZUO
IPC分类号： G01R15/20 , G01R1/22 , G01R15/18 , G01R21/08
摘要： PURPOSE:To simultaneously detect the current and power of a line, by flowing a control current consisting of two components of a DC current and an AC current to one hole element. CONSTITUTION:A Hall element 3 is assembled in a magnetic circuit of a pair of magnetic cores 2 capable of externally enclosing a line 1 to be measured. AC voltage from an AC power source 8 is inputted to an adder 12 through a voltage setting device 11 and a changeover device 9D while DC voltage from a DC power source 7 is inputted to said adder 12 through a voltage setting device 13 and a changeover device 9E. Both AC and DC voltages are added by the adder 12 and further receive voltage/current conversion by a voltage/current converter 14 before applied to the element 3. From Hall voltage outputted from the element 3, signal voltage having frequency two times the voltage of the line unnecessary for measuring AC power and current is removed through a buffer amplifier 20 and a low pass filter 21 and the output voltage of the filter 21 is further inputted to the low pass filter 22 on one hand and indicated by an indicator 6 on the other hand through a condenser 23 and rectifier/smoothing device 24. Therefore, the current and power of the line can be measured simultaneously.

37. 发明专利

JPS5790176A IN-PHASE VOLTAGE REMOVING CIRCUIT FOR HALL ELEMENT 失效
公开(公告)号：JPS5790176A
公开(公告)日：1982-06-04
申请号：JP16640980
申请日：1980-11-26
申请人： TOKYO SHIBAURA ELECTRIC CO
发明人： MATSUI KUNIHIKO , TANAKA SHIYUU
IPC分类号： G01R33/07 , G01D5/14 , G01R17/06 , G01R21/08 , G01R33/06
摘要： PURPOSE:To enable the removal of in-phase components with a simple circuit structure dispensing with a differential amplification circuit by virtually grounding one of output terminals of a Hall element while the output voltage thereof is drawn from the other. CONSTITUTION:A first control current terminal 11a of a Hall terminal 11 is connected to a constant currnet source 12 and a second control terminal 11b to the output terminal of an arithmetic amplifier OP11. The non-inversion input terminal of the arithmetic amplifier OP11 is grounded and a first output terminal 11 of the Hall element 11 is connected thereto. The Hall output voltage from the second output terminal 11d of the Hall element 11 is led to a meter 14 by way of the arithmetic amplifier OP12 and a non-inversion amplification circuit 13. The current running from the Hall element 11 flows to the Hall element 11 as control current and then, drawn into the arithmetic amplifier OP11. As the first output terminal 11c of the Hall element 11 is at an earth potential, the Hall output voltage removed in the in-phase alone can be obtained from the second output terminal 11d and taken out of the non-inversion amplification circuit 13.

38. 发明专利

JPS53115155A MULTIPLYING EQUIPMENT USING HALL DEVICE 失效
公开(公告)号：JPS53115155A
公开(公告)日：1978-10-07
申请号：JP3009077
申请日：1977-03-18
申请人： TOKYO SHIBAURA ELECTRIC CO
发明人： MATSUI KUNIHIKO , TANAKA SHIYUU , KOBAYASHI TETSUJI
IPC分类号： G06G7/162 , G01R11/32 , G01R21/08 , G01R22/00
摘要： PURPOSE:To obtain a multiplying equipment which can realize easily an automatic meter inspection and features a high accuracy and high reliability with compact and light-weight structure, by using the Hall device for the means which acquire the product of the current and the voltage.

39. 实用新型

JPS5020569U 失效
公开(公告)号：JPS5020569U
公开(公告)日：1975-03-08
申请号：JP7223073
申请日：1973-06-20
IPC分类号： G01R21/08 , H01L23/04

40. 发明专利

JPS49115283A 失效
公开(公告)号：JPS49115283A
公开(公告)日：1974-11-02
申请号：JP2370673
申请日：1973-03-01
IPC分类号： G01R21/08 , G01R21/09 , H01L43/06

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